export_index.py

import http.client
import json

conn = http.client.HTTPConnection("localhost:9200")
conn.request("GET", "/my_index/_search?size=10000")
r1 = conn.getresponse()

result = json.loads(r1.read().decode('utf-8'))
for hit in result["hits"]["hits"]:
    print(json.dumps({ "index" : { "_type": hit["_type"], "_id" : hit["_id"] }}))
    print(json.dumps(hit["_source"]))